Exhaustigating 

The point at which exhaustion and frustration combine that leads one to bang their head against the wall, repeatedly and forcibly.

Telly: Watching the presidential debates is exhaustigating.

Chris: But not nearly as exhaustigating as back to back conference calls without a bathroom or lunch break.

Exhaustigating by Hell Yes, I Would October 11, 2016

exhaustipating 

The process of becoming exhaustipated.

Cutting down the trees was an exhaustipating experience for him, and he needed to rest.

exhaustipating by Satch71 August 29, 2019